diff --git a/src/add-ons/kernel/bus_managers/acpi/oshaiku.c b/src/add-ons/kernel/bus_managers/acpi/oshaiku.c
index 02f11f3ee2..3ff738aedb 100644
--- a/src/add-ons/kernel/bus_managers/acpi/oshaiku.c
+++ b/src/add-ons/kernel/bus_managers/acpi/oshaiku.c
@@ -645,7 +645,7 @@ AcpiOsCreateLock(ACPI_SPINLOCK *outHandle)
 	if (*outHandle == NULL)
 		return AE_NO_MEMORY;
 	
-	**outHandle = 0;
+	**outHandle = B_SPINLOCK_INITIALIZER;
 	return AE_OK;
 }